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WITNESSV- BY A. A.EVANS.

AUTOMATIOTRAIN STOPPING MECHANISM.

Amlcmqu mm AUG-l5, 1919.

Patentd Au 10,1920.

2 SHEETS-SHEETLI I Q; J3. J9. Evan 6 INVENTOR.

AVI'TORNE Y..

A. A. EVANS. urommc IRAIN STOPPING MECHANISM. APPLICATION FILED AUG. l5,19%9.

1,349,504, Patented Aug. 10, 1920.

2 SHEETS-SHEET 2.

.5. J17. Evan a v WITNESS: & I I INVENTOR. 926M A TTORNE Y.

UNITED AU'roMArIo Tm emmm To all whom concern: 1 o

Be it known that L'ALVA A. EVANS, a citi- 'zen of the United States,residing at Annona, in the county of Red River and State; of Texas, have'invented new and useful Im--t provements in 7 Automatic Train-StoppingMechanism, of which the following is specification.

The object of my present invention is the provision of a purely.mechanipal, auto gf matic train-stopping mechanism, and one that issimple and inexpensive.inconstruc tion, susceptible of ready installaton; and p p i p s 1 7 ,w1th :an upright *retractilespringp13, the 70reliable in operation. I

Tothe attainment. of the foregoing theinvention consists in thepeculiarandad? vantageous train-stopping mechanism hereq inafterdescribed" and 'definitelyclaimem p i i P Q i Q ssist,- in'promptup'ward move-2'75.

.mentof the rod 11 'and ratchetbar 12, ;fol

bodiment of my invention of which I am cognizant. Y I

Fig. 2 is an enlargeddetail view showing the means for locking thethrottle leverand the air-valve lever in open position fol.-'

lowing an operation of the. mechanism.

Fig. 3 is a detailfsection showing the cone. nection of the forward endofgthe longitudl:

nal,-downwardly-bowed spring. Fig. 4: is anenlarged detail sectionshowing the cylinders and the parts complemen -1 tary thereto.

Similar numerals of reference designate corresponding parts in all ofthe views of the drawings.

. The major portion of my improvement is designed to becarried upon alocomotive 1,

and among other elements the mecha-],- nism comprises a longitudinaldownwardly bowed spring 2, that is connected at its. rear end to'a'hanger-3 on the locomotive,'f

and has a longitudinal slot 4:.ELdjELC6I1t-t0 its forward end forthereception of a bolt 5. carried in a hanger. 6 that depends from one' ofthe drive boxes of the'locomotive or from any other suitablepartthereof.l fanifestly the provisionjust described enables the for-: wardend ofthespring-Q to-move forwardly when the intermediate portionofthe-spring. is pressed upwardly, and in that way con tributes to thereliability of the organized mechanism. At 7 and 8 are supplementalsprings interposed between intermediate portions of the bowed spring anda locloof the spring 2. Prov'idedjon motive:part '9,j-abover'spring2fand-having f [for 7 their function to" assist the upward; v. .movementof the intermediate spring poi tion, and inthatway-contribute tov the; Iiprom-pt .operation 'iof the. mechanism undercertainconditions,1:as'hereinafter set. forth. a

Carried at the side of; thelocomotiveis an upright guide tube- 10, andextending throughband] adaptedto play in said tube 13,311upr1ghtrod111,thelower end'of which 1 isconnectedyto the spring 2.Atitsupper ,T

. end' the rodll is conneeted'to a ratchet bar; I

12,"a'nd the said bar-l2-is.connected,;in turn,

lowing upward movement of .the "bowed "spring 2- iIniconjunctioniwith-the ratchet bar'12',.is provided aspring-pressed'dog 15 a which-has for itslfunction to effectively pre-'vel t wcidentaldownwardmovement'o'fthe. Q I rodlll after the said rodisforced upwardly-31' -byraction' againstthe under sideof the] spring2.; It "will be readily understood that afterj anoperation ofmy.novelmech- I anism, the dog 15 is manually disengaged from the rear,bar 12 to permit of downward ..movement' of said rod'11 under thetension j r i relative arrangement illustrated, are longi- 2tudinallyr'disposed vhorizontal 'cylinders 16 v A and 17 each; ofwhichis preferably,though not necessarlly, provided adjacent to its rearendwith a pet fcock18. ;At19is the'throttle;

lever-foflthe'locomotive, andv at20 is the 1 leverof the 'engineersvalve complementary to a fluid-pressure brake system" Movable I thecylinderlois a piston 21,- the rod 22 f of which 'is-cfarriedthrough aguidel23 and'100' is:.connected"to.the throttle valve lever 19, V Iwliile' movableinthe cylinder'17 is afpiston 24:havi-ng'a rod 25, 1disposed .in. a. guide 26 and connected with thelvalvef-lever 20.-Intermediate "of; a suitable point in the steam generatorof thelocomotive andthe forward]; f

portions of the cylinders 1'6" and 17, is a con duit 30 which-is'a'valve" 31, havinga lever .32 that is'connected to the rod 11 andisalsoi" "connected: to a ;retractilefspring 33, said i spring 33 beingconnected at itslupper endtoabracket34=,"and;being designed to assist Ie p s Patentea'nug; 10, 192 0:; x Application filed August 15, 1919;serial; 110,317,736, Y v

the name in adathe 90 in the prompt opening of the valve ,317 incidentalto upward movement of the rod 11.

' The rods 22 and 25 are preferably formed of sections hinged togetherat 25", w 7

It will be apparent from the foregoing that upon upward movement of theintermedlate portion of the bowed sprlng 2, the 7 7 rod 11 will'bethrustupwardly and will'be eutomaticallylocked in raised position, and thatthe upward movement offthe sald rod 11 willbe attended by opening or"the valve 31 and the retention of the-valve in open 1 position, with theresult that steam will be letinto the cylinders 16 and 17 to move saidpistons forwardly and to operate the valves 19 and 20, which operationwill bring about 7 the stopping of the train.

To release my novel mechanism afteran operation thereof, it is simplynecessary for the1engineerto disengage the dog 15 from the ratchet bar12, whereupon the spring 2 will overcome the other springs and will, inmoving the rod 11 downwardly, close. the valve 31, whereby by manualadjustment of the levers 19 and 20, the engineer can close thethrottleand air valve and properly position the pistons in the cylinders16 and 17 in readiness for a subsequent operation;

The'spr ng 2' 1s arranged to'move along at one side of a railway rail40, and my invention contemplates the placing at the side rsaaso l ofthe rail 40 of a tappet 41; the said tappet being adapted to be,positioned by a sectionforeman or other person having authority to stopa train in an emergency. Manifestly when the bowed spring 2 is carriedover and is pressed upwardly by the said tappet 41,

the operation herebefore described will be brought about.

Having described my invention, what I claim and desire to secure byLetters-lata ratchet bar connected to the upper end of said rod, a dogfor preventing casual downward movement of the ratchet bar,longitudinally disposed cylinders, a conduit intermediate of a source ofsteam supply and the cylinders and having a rocking valve on which is'alever loosely and directly connected with said rod, and pistonsdisposedin said cylinders andconnected with the throttle lever and thevalve lever.

In testimony whereof I affix my signature.

ALVA A, EVANS.

